ThermochemistryEasy
Question
The enthalpies of combustion of carbon and carbon monoxide are -393.5 and -283 kJ mol-1 respectively. The enthalpy of formation of carbon monoxide per mole is
Options
A.110.5 kJ
B.-110.5 kJ
C.-676.5 kJ
D.676.5 kJ
Solution
C + O2 → CO2 ᐃH = - 393.5 kJ
2CO + 1/2 O2 → 2CO2 ᐃH = - 283 kJ
2C + O2 → 2CO ᐃH = - 110 kJ
2CO + 1/2 O2 → 2CO2 ᐃH = - 283 kJ
2C + O2 → 2CO ᐃH = - 110 kJ
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